A fingerprint identification structure and a display panel are disclosed. display panel includes a fingerprint identification structure. The fingerprint identification structure includes a light energy switch and a thermosensitive light path adjustment structure. The light energy switch is configured to switch from an open circuit to a closed circuit under light irradiation. The thermosensitive light path adjustment structure is connected to a surface of the light energy switch, is able to transmit light internally, and is configured to adjust a light path of light to drive the light to irradiate the light energy switch when receiving a heat source.
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3. The fingerprint identification structure as claimed in claim 1, wherein a refractive index of the light selective transmission layer is less than a refractive index of the light transmission layer.
5. The fingerprint identification structure as claimed in claim 1, wherein the light direction control layer comprises a diffuse reflection surface with concave and convex, and the diffuse reflection surface is connected to the light transmission layer.
A fingerprint identification structure includes a light direction control layer with a diffuse reflection surface having concave and convex features. This surface is connected to a light transmission layer, which allows light to pass through. The structure is designed to improve the accuracy and reliability of fingerprint identification by controlling the direction of light used in the scanning process. The diffuse reflection surface scatters light in multiple directions, enhancing the capture of fingerprint details. The light transmission layer ensures that the scattered light reaches the sensor or detection mechanism efficiently. This design helps reduce errors caused by uneven lighting or surface irregularities, making the fingerprint identification more robust in various conditions. The structure may be integrated into devices such as smartphones, security systems, or biometric authentication devices to provide secure and accurate fingerprint recognition. The combination of the diffuse reflection surface and the light transmission layer optimizes the optical path, improving the overall performance of the fingerprint identification system.
6. The fingerprint identification structure as claimed in claim 5, wherein the light transmission layer comprises a plurality of recesses/holes, and the light transmission layer is disposed in the recesses/holes.
This invention relates to fingerprint identification structures, specifically focusing on improving light transmission for enhanced biometric sensing. The problem addressed is the need for better optical clarity and structural integration in fingerprint sensors to ensure accurate and reliable identification. The solution involves a light transmission layer with a plurality of recesses or holes, which is embedded within these recesses. This design optimizes light passage through the sensor, improving the detection of fingerprint patterns. The light transmission layer is strategically placed to minimize interference and enhance signal quality, ensuring precise fingerprint recognition. The recesses or holes in the layer facilitate uniform light distribution, reducing distortions and improving the overall performance of the biometric sensor. This structural arrangement ensures that the light transmission layer is securely integrated, maintaining durability while enhancing optical efficiency. The invention is particularly useful in applications requiring high-precision fingerprint identification, such as smartphones, security systems, and access control devices. By improving light transmission and structural stability, the invention addresses common challenges in fingerprint sensor technology, such as low-light performance and signal accuracy.
7. The fingerprint identification structure as claimed in claim 6, wherein the diffuse reflection surface comprises a plurality of reflection units, and a shape and a dimension of each of the reflection units matches a shape and a dimension of each of the recesses/holes.
This invention relates to a fingerprint identification structure designed to enhance the accuracy and reliability of fingerprint scanning by improving light reflection. The structure addresses the problem of inconsistent or low-quality fingerprint images caused by uneven light distribution during scanning, particularly in optical or capacitive fingerprint sensors. The invention includes a diffuse reflection surface composed of multiple reflection units, each precisely matching the shape and dimensions of recesses or holes in the sensor surface. This matching ensures uniform light reflection across the fingerprint surface, reducing distortions and improving image clarity. The reflection units are arranged to optimize light scattering, minimizing glare and enhancing contrast between ridge and valley features of the fingerprint. The structure can be integrated into various fingerprint sensing technologies, including those used in mobile devices, security systems, and biometric authentication applications. By providing a consistent and controlled reflection pattern, the invention enables more accurate fingerprint matching and reduces false rejection rates. The design is particularly useful in applications requiring high-resolution fingerprint imaging under varying lighting conditions.
8. The fingerprint identification structure as claimed in claim 7, wherein the reflection units are semi-spherical and are arranged in an array.
A fingerprint identification structure includes a substrate with an array of semi-spherical reflection units. The reflection units are arranged in a grid pattern to form a structured surface. Each reflection unit is designed to reflect light in a controlled manner, enhancing the detection of fingerprint patterns. The semi-spherical shape of the reflection units ensures uniform light reflection across the surface, improving the accuracy of fingerprint recognition. The array configuration allows for precise alignment with fingerprint ridges and valleys, enabling high-resolution imaging. The structure is used in biometric devices to capture detailed fingerprint images for authentication purposes. The semi-spherical design and array arrangement optimize light interaction, reducing distortion and improving contrast in captured fingerprint data. This enhances the reliability of fingerprint identification systems in security applications. The reflection units may be made of materials with high reflectivity to further improve performance. The structured surface ensures consistent reflection properties, making the system robust against variations in lighting conditions. The overall design improves the efficiency and accuracy of fingerprint recognition in electronic devices.
9. A display panel, comprising the fingerprint identification structure as claimed in claim 1.
A display panel includes a fingerprint identification structure integrated into the panel. The fingerprint identification structure comprises a fingerprint sensing layer and a light-emitting layer. The fingerprint sensing layer is configured to detect fingerprint patterns by sensing variations in capacitance or optical signals when a user's finger interacts with the surface. The light-emitting layer, positioned adjacent to the sensing layer, emits light that passes through the sensing layer to illuminate the fingerprint area. The structure is designed to be thin and transparent, allowing the display panel to maintain high optical transparency while enabling fingerprint recognition. The integration of the sensing and light-emitting layers ensures that the fingerprint identification function does not interfere with the display's visual performance. The display panel may be used in smartphones, tablets, or other electronic devices requiring secure biometric authentication. The technology addresses the need for seamless, high-resolution fingerprint recognition in modern displays without compromising visual quality or device aesthetics.
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March 20, 2020
November 15, 2022
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